Polaris R09VA17AA, Service Manual

Page: 61 / 187

3.17
ENGINE
3
Cylinder Head Inspection
1. Thoroughly clean cylinder head surface to remove all
traces of gasket material and carbon.
Cylinder Head Warp Inspection
1. Lay a straight edge across the surface of the head at several
different points and measure warpage by inserting a feeler
gauge between the straight edge and the cylinder head
surface. If warpage exceeds the service limit, replace the
cylinder head.Milling the
Combustion Chamber Inspection
Clean all accumulated carbon deposits from combustion
chamber and valve seat area with a soft wire brush. Inspect the
combustion chamber for cracks and/or damage from foreign
debris.
Cylinder Head Disassembly
NOTE: Keep all parts in order with respect to their
location in the cylinder head.
NOTE: Valves have inner and outer springs.
1. Using a valve spring compressor, compress the valve
springs and remove the split keeper.
NOTE: To prevent
loss of tension, do not compress the valve spring more than
necessary.
2. Remove spring retainer and spring.
NOTE: The valve springs should be positioned with
the tightly wound coils against the cylinder head on
progressively wound springs (A).
3. Push valve out, keeping it in order for reassembly in the
same guide.
CAUTION
Use care not to damage sealing surface.
If there is damage found on the cylinder head
combustion chamber, it is recommended the
component be replaced.
= In. / mm.
Cylinder Head Warp Limit: .002” (.05 mm)
WARNING
Wear eye protection or a face shield during
cylinder head disassembly and reassembly.
A
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